The impact of concentrated flow and slope on unpaved loess-road erosion on the Chinese Loess Plateau

doi:10.1002/ldr.3774

	The impact of concentrated flow and slope on unpaved loess-road erosion on the Chinese Loess Plateau
	Guo, Wenzhao 2,3,4,5; Bai, Yun 1; Cui, Zhiqiang 4; Wang, Wenlong 2,4; Li, Jianming 4,5; Su, Zhengan 3
刊名	LAND DEGRADATION & DEVELOPMENT
	2020-10-04
页码	12
关键词	Chinese Loess Plateau erosion assessment rill road erosion soil erosion
ISSN号	1085-3278
DOI	10.1002/ldr.3774
通讯作者	Wang, Wenlong(nwafu_wwl@163.com)
英文摘要	Loess-roads (LR) still experience severe soil erosion due to concentrated flow during rainstorms in watersheds on the Chinese Loess Plateau, where soil erosion in sloping farmland, abandoned land, and grassland has been controlled. However, road erosion is commonly overlooked because unpaved roads represent a small part of the catchment area. In situ scouring-erosion experiments were performed on LR surfaces in the Liuaogou watershed on the Loess Plateau. The erosion rate of the LR was 14.1-234.6 g m(-2)min(-1), which is 10.8-57.5-times higher than that on an adjacent grassy hillslope. In most experiments, the LR erosion rate generally increased linearly with increasing concentrated flow and slope gradient (R-2 > .85; significancep < .05). Concentrated flow had a greater impact on road erosion than the road surface slope. Rill erosion occurred in our road plots, with rill area densities of 0.03-0.38 m(2)m(-2). The total amount of road erosion was significantly correlated linearly with the rill area density (R-2= .61,p < .01), indicating that high rill density led to high total erosion on the LR. A road erosion equation based on concentrated flow and slope gradient was established and validated. TheR(2),p, and NSE results were .91, <.01 and 0.93, respectively, implying that the fitted equation can be considered acceptable. Our findings can provide references for the prevention of road erosion and the establishment of road erosion models.
资助项目	National Key Research and Development Program of China[2016YFC0501604] ; CRSRI Open Research Program[CKWV2019762/KY] ; National Natural Science Foundation of China[41761062] ; National Natural Science Foundation of China[41701316] ; Open Research Program of the Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences[KLMHESP-20-03]
WOS关键词	FOREST ROADS ; ST-JOHN ; SEDIMENT PRODUCTION ; GULLY EROSION ; RUNOFF ; SEGMENT
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	WILEY
WOS记录号	WOS:000574769900001
资助机构	National Key Research and Development Program of China ; CRSRI Open Research Program ; National Natural Science Foundation of China ; Open Research Program of the Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156985]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Wenlong
作者单位	1.Yulin Univ, Shaanxi Key Lab Ecol Restorat Shanbei Min Area, Yulin, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Water & Soil Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 5.Changjiang River Sci Res Inst Changjiang Water Re, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Guo, Wenzhao,Bai, Yun,Cui, Zhiqiang,et al. The impact of concentrated flow and slope on unpaved loess-road erosion on the Chinese Loess Plateau[J]. LAND DEGRADATION & DEVELOPMENT,2020:12.
APA	Guo, Wenzhao,Bai, Yun,Cui, Zhiqiang,Wang, Wenlong,Li, Jianming,&Su, Zhengan.(2020).The impact of concentrated flow and slope on unpaved loess-road erosion on the Chinese Loess Plateau.LAND DEGRADATION & DEVELOPMENT,12.
MLA	Guo, Wenzhao,et al."The impact of concentrated flow and slope on unpaved loess-road erosion on the Chinese Loess Plateau".LAND DEGRADATION & DEVELOPMENT (2020):12.